lib/validations/validates_length_of.rb in validatable-1.3.0 vs lib/validations/validates_length_of.rb in validatable-1.3.2

@@ -1,16 +1,21 @@
 module Validatable
   class ValidatesLengthOf < ValidationBase #:nodoc:
-    option :minimum, :maximum, :is, :within
+    option :minimum, :maximum, :is, :within, :allow_nil
     
     def message
       super || "is invalid"
     end
     
     def valid?(instance)
       valid = true
-      value = instance.send(self.attribute) || ""
-
+      value = instance.send(self.attribute)
+      
+      if value.nil?
+        return true if allow_nil
+        value = ""
+      end
+      
       valid &&= value.length <= maximum unless maximum.nil? 
       valid &&= value.length >= minimum unless minimum.nil?
       valid &&= value.length == is unless is.nil?
       valid &&= within.include?(value.length) unless within.nil?
       valid